Originally Posted by NISSANMASTER

option number 2 is slightly more costly, but it will fix this problem with a FACTORY style fix. I was unable to find a cheap BMW tank insert, so I got manufacturer names and sought the same part for other brand vehicles and hit gold on VW. here is a link to ebay for the part that matches the bmw part 100%

2007 2010 VW Volkswagen Touareg Heater Element for Urea Tank 7L6198970A | eBay

I hope this helps and I did photograph my adventure of fixing the tank with the 10k resistor.